Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

22. Organic Chemistry

Naming Alkynes

General Chemistry

22. Organic Chemistry

Naming Alkynes

Previous problemNext problem

Struggling with General Chemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Draw a structure for 4-ethyl-7-phenyl-2-heptyne.

Chemical structure of 4-ethyl-7-phenyl-2-heptyne.

Chemical structure of 4-ethyl-7-phenyl-2-heptyne with detailed bonds.

Chemical structure of 4-ethyl-7-phenyl-2-heptyne showing carbon and hydrogen atoms.

Chemical structure of 4-ethyl-7-phenyl-2-heptyne with labels for substituents.

Previous problemNext problem

Verified step by step guidance

Identify the main chain: The name '2-heptyne' indicates a seven-carbon chain with a triple bond starting at the second carbon. Draw a seven-carbon chain and place a triple bond between the second and third carbon atoms.

Locate the ethyl group: The '4-ethyl' part of the name indicates an ethyl group (C2H5) attached to the fourth carbon of the main chain. Add this group to the fourth carbon.

Locate the phenyl group: The '7-phenyl' part of the name indicates a phenyl group (C6H5) attached to the seventh carbon of the main chain. Add this group to the seventh carbon.

Check for correct bonding: Ensure that each carbon atom forms four bonds. Adjust the number of hydrogen atoms on each carbon to satisfy the tetravalency of carbon.

Verify the structure: Double-check the placement of the ethyl and phenyl groups, as well as the position of the triple bond, to ensure the structure matches the IUPAC name '4-ethyl-7-phenyl-2-heptyne'.